Refactor focus statistics and curve fitting
The nonlinear least-squares solving in GSL has been rewritten to offer a simpler, more powerful interface with more robust solving routines. This takes advantage of them.
TODO:
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Update documentation -
Determine cause of differing HFR test result (https://invent.kde.org/spacekitteh/kstars/-/jobs/439479#L2029) - is it due to the stable CI using different StellarSolver/GSL versions?
Edited by Sophie Taylor